Coffee machine



FIG. 1 is a perspective view of a coffee machine according to my newdesign;

FIG. 2 is a front view of the coffee machine;

FIG. 3 is a left side view of the coffee machine;

FIG. 4 is a right side view of the coffee machine;

FIG. 5 is a rear view of the coffee machine; and,

FIG. 6 is a top plan view thereof.

The ornamental design for a coffee machine, as shown and described.